Trying to migrate site from EE3 to EE4.
Getting this error after update ahead of page HTML - on all pages.
Warning array_flip(): Can only flip STRING and INTEGER values! ee/EllisLab/Addons/channel/mod.channel.php, line 4245
Am assuming it is Addon related somehow, but would value any insights about what / where.
Wondering what happened to the promise from Ellis that EE3 - EE4 updates would not break EE3 addons…